TP-Link Archer A7 snapshot bugs

What is the best way to report snapshot bugs for a specific device? I have an Archer A7 and I found a bug that when you delete all the VLAN entries, the add button will not add a blank vlan entry. I also have a question about performance. It seems that I can't get above 150mbps from WIFI to WAN but I can WIFI to LAN.

I can get the full bandwidth of my ISP WIFI > LAN > router to ISP but WIFI > WAN > router to ISP only 150mbps.

The OEM firmware works fine in this configuration. I'm ultimately going to replace my router with the A7 once I get the speed up. I tried it WIFI > WAN > ISP modem with the same slow results.